Covariant cosmological perturbation dynamics in the large-scale limit

Details Covariant cosmological perturbation dynamics in the large-scale limit Covariant cosmological perturbation dynamics in the large-scale limit

1998-04-07

arxiv.org/abs/gr-qc/9804022v1

Phys.Rev. D57 (1998) 7607-7610

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, Revtex, to appear in PRD

Scientific paper

10.1103/PhysRevD.57.7607

Using the existence of a covariant conserved quantity on large perturbation scales in a spatially flat perfect fluid or scalar field universe, we present a general formula for gauge-invariantly defined comoving energy density perturbations which encodes the entire linear perturbation dynamics in a closed time integral. On this basis we discuss perturbation modes in different cosmological epochs.

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